The promise of “Chinese story elements” in Escape Plan 2 leads one to suspect the movie might take place inside a Chinese prison, which would be an interesting way to up the ante on the action in the original movie.
If nothing else, all his work with Bruce Willis has given Miller lots of experience in dealing with former ’80s action stars, and that will come in handy when he directs Stallone (and maybe Schwarzenegger) in Escape Plan 2.
In 2015 he directed Extraction starring Bruce Willis, and in 2016 he was behind the camera for Marauders, also starring Bruce Willis.
The first Escape Plan starred Stallone as a designer of super-high-security prisons who found himself locked up inside one of his own creations after being framed.